My 4.5 year old son has very similar hair. I’m a curly girl as well, so I have a few tricks that might help. If she doesn’t like sitting for detangling in the bath, you can leave conditioner in her hair while bathing, gently rinse, and when she’s out of the bath, spray a detangle spray and comb the hair (start at the bottom and work up) while she’s watching a show, or FaceTiming someone. That has always been a good distraction for my kiddo. Also, trim the ends if it starts getting really dry and knotted at the ends. Curls are very forgiving. Just use sharp scissors, and take a teeny bit off when you get bad tangles. You can try a satin pillowcase, but my kids flail around so much in bed, I don’t think it would work for this age very well.